package com.sgj.springcloud.controller;

import com.sgj.springcloud.entities.CommonResult;
import com.sgj.springcloud.entities.Payment;
import com.sgj.springcloud.enums.ResEnum;
import com.sgj.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.net.URI;
import java.util.List;
import java.util.Objects;

/**
 * @author 沈国纪
 * @date 2021/5/7 21:37
 */
@RestController
@Slf4j
public class OrderController {

	// public static final String PAYMENT_URL = "http://localhost:8001";
	// 通过在 Eureka 上注册过的微服务名称调用
	public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

	@Autowired
	private RestTemplate restTemplate;

	@Autowired
	private LoadBalancer loadBalancer;

	@Autowired
	private DiscoveryClient discoveryClient;

	/**
	 * 新增订单
	 * @param payment
	 * @return
	 */
	@GetMapping("/consumer/payment/create")
	public CommonResult<Payment> create(Payment payment) {
		// post 请求
		return restTemplate.postForObject(PAYMENT_URL + "/payment/create", payment, CommonResult.class);
	}

	/**
	 * 新增订单
	 * @param payment
	 * @return
	 */
	@GetMapping("/consumer/payment/createEntity")
	public CommonResult<Payment> create2(Payment payment) {
		ResponseEntity<CommonResult> entity = restTemplate.postForEntity(PAYMENT_URL + "/payment/create", payment,
				CommonResult.class);
		if (entity.getStatusCode().is2xxSuccessful()) {
			return entity.getBody();
		} else {
			return new CommonResult<>(ResEnum.FAIL_SEARCH2.getCode(), ResEnum.FAIL_SEARCH2.getMessage());
		}
	}

	/**
	 * 查询订单
	 * @param id
	 * @return
	 */
	@GetMapping("/consumer/payment/get/{id}")
	public CommonResult<Payment> getPayment(@PathVariable("id") Long id) {
		// get 请求
		return restTemplate.getForObject(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
	}

	/**
	 * 查询订单
	 * @param id
	 * @return
	 */
	@GetMapping("/consumer/payment/getEntity/{id}")
	public CommonResult<Payment> getPayment2(@PathVariable("id") Long id) {
		ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/payment/get/" + id,
				CommonResult.class);
		if (entity.getStatusCode().is2xxSuccessful()) {
			return entity.getBody();
		} else {
			return new CommonResult<>(ResEnum.FAIL_SEARCH2.getCode(), ResEnum.FAIL_SEARCH2.getMessage());
		}
	}

	@GetMapping("/consumer/payment/lb")
	public String getPaymentLB() {
		List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
		if (Objects.isNull(instances) || instances.size() <= 0) {
			return null;
		}

		ServiceInstance serviceInstance = loadBalancer.instances(instances);
		URI uri = serviceInstance.getUri();

		return  restTemplate.getForObject(uri + "/payment/lb", String.class);
	}

	@GetMapping("/consumer/payment/zipkin")
	public String paymentZipkin() {
		String result = restTemplate.getForObject("http://localhost:8001" + "/payment/zipkin/", String.class);
		return result;
	}

}
